The following experiment is designed to study the role of several hormones in the regulation of metamorphosis in frogs.

Group #	Treatment	Days to Metamorphosis
1	Saline	30
2	Prolactin	> 100
3	TSH	15
4	Thyroxine	10
5	Corticosterone	30
6	Thyroxine + Corticosterone	5
7	Prolactin + TSH	30
8	Thyroid gland removed	> 100

 If the thyroid gland were removed from the tadpoles in Group 3, metamorphosis would

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#Question id: 4579

#Unit 11. Evolution and Behavior

About which of these did Darwin have a poor understanding?

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#Question id: 26432

#Unit 3. Fundamental Processes

If the mismatch is near 3’ then which of the following will degrade strands of DNA in the 5’ → 3’ direction only

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#Question id: 2637

#Unit 2. Cellular Organization

Which of these operons is anabolic?

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#Question id: 11099

#Unit 7. System Physiology – Animal

In the mammalian alveoli, the partial pressure of O2 is _______ that of atmospheric air and the CO2 partial pressure is _______ that of atmospheric air

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#Question id: 15786

#Unit 5. Developmental Biology

Although iPSCs are functionally pluripotent, they are best at generating the cell types of the organ from which the parent somatic cell (naïve versus primed ESCs) originated. These data suggest that